KR0158322B1 - Television receiver equipped with broadcasting fanal channel osd function - Google Patents

Abstract

The present invention relates to a television receiver having a broadcasting end channel display function capable of displaying another channel where the broadcasting is terminated while watching an arbitrary broadcasting channel, and includes a second tuner in addition to the first tuner for selecting a broadcasting channel. In one television receiver, channel memory means for storing broadcast channel data, pre-international language means for sequentially internationalizing the second tuner based on the channel data stored in the channel memory means, and tuning by the second tuner. And synchronous detecting means for detecting a synchronous signal from the received broadcast signal, and display means for displaying on the CRT a broadcast channel whose synchronous detection is not detected by the synchronous detecting means.

Description

Television receiver with end channel display

1 is a block diagram showing the configuration of a television receiver having a general sub picture function.

2 is a block diagram showing the configuration of a television receiver having a broadcasting end channel display function according to an embodiment of the present invention.

3 is an operation flow for explaining the operation of the apparatus shown in FIG.

4 is a diagram showing an example of a broadcast end display screen according to the present invention;

5 is a block diagram schematically showing the configuration of the OSD generator in FIG.

* Explanation of symbols for main parts of the drawings

1 antenna 2 first tuner

3: First IF amplifier part 4: 1P / S separation part

5: voice detector 6: first image detector

7: 2nd tuner 8: 2IF amplification part

9: second P / S separator 10: second image detector

11: PIP memory 12: PIP processing unit

13: external AV device 14: switching unit

15: voice processing unit 16: voice amplifier

17: image processor 18: mixer

19: CRT driver 21: receiver

22: channel memory 31: remote control device

32: synchronization detector 33: OSD generator

34: control unit

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a television receiver, and more particularly, to a television receiver having a broadcasting end channel display function capable of displaying another channel where broadcasting is terminated while watching a certain broadcasting channel.

Currently, in case of general broadcasting program, the broadcasting station provides the program at the contracted time according to the program plan, and the program guide is executed through newspapers or other media so that viewers know the broadcasting time of the program.

However, in most program broadcasts, late nights, because the time that the program is actually broadcasted through a television receiver (hereinafter referred to as TV) for the reasons of the broadcasting station does not match the scheduled broadcast time provided through the program guide. In the case of a viewer watching TV in time, the channel is sometimes cumbersomely changed to find a broadcast channel that has not been broadcasted.

On the other hand, the recent development of a TV that has a picture in picture (PIP) function, allowing viewers to watch multiple broadcasts at the same time, allowing viewers to view programs on other broadcast channels while watching one broadcast channel. It became.

2 is a block diagram schematically illustrating the configuration of a TV having the PIP function, in which reference numeral 1 is an antenna, and 2 is a broadcast received through the antenna 1 under the control of a controller to be described later. A first tuner that tunes a predetermined broadcast signal for the main picture from the signal, 3 is a first IF amplifier for amplifying the IF signal output from the first tuner 2, and 4 is a first IF amplifier 3 For example, surface elasticity for separating the image intermediate frequency signal (PIF) and the audio intermediate frequency signal (SIF) from the output IF signal, the first P / S separation unit such as a filter, etc. The detector 6 is an image detector for detecting an image signal from the PIF signal.

Further, reference numeral 7 denotes a second tuner for tuning the broadcast signal for the sub-screen under control of the controller, and 8 denotes a second IF amplification for amplifying the intermediate frequency signal of the broadcast signal tuned by the second tuner 7. 9 is a second P / S separation unit for detecting a PIF (image intermediate frequency) signal from an intermediate frequency output from the second IF amplifier 8, and 10 is an output from the second P / S separation unit 9; A second video detector detects a video signal from the PIF signal.

In addition, reference numeral 11 is a PIP memory for storing the image signal detected by the second image detector 10 described above, and 12 stores and reads the image to the PIP memory 11 under the control of the controller. The PIP processing unit performs sub-picture processing by outputting to the image processing unit 17 described later.

Reference numeral 13 denotes an external AV device such as a VCR or a laser disc player, and 14 denotes an audio from the voice detector 5 and the image detector 6 according to the switching signal from the controller 24. A switching unit for selectively outputting video signals and audio and video signals from the external AV device 13.

Although reference numeral 15 is not shown for the audio signal output from the switching unit 14, voice processing such as bass, treble, volume, etc. is performed according to a control signal from the controller. 16 is an audio amplifier which amplifies the audio signal processed by the audio processor 15 and outputs it to the speaker.

Reference numeral 17 denotes an image processor which superimposes and outputs the sub-screen image signal input from the above-described PIP processing unit 12 with respect to the image signal input from the switching unit 14, and 18 denotes from the image processing unit 17. Mixer which mixes the output video signal and the OSD pattern signal output from the OSD generator 23 to be described later, 19 is a CRT for driving the CRT based on the video signal (RGB signal) output from the mixer 18 It is a driving unit.

Reference numeral 20 is a remote control device for the viewer to select a sub-screen function, 21 is a receiving unit for converting and inputting an infrared signal input from the remote control device 20 into an electrical signal, 22 is the first and second Channel memory for storing channel data for tuning two tuners (2, 7), 23 is an OSD generator for outputting OSD pattern data for displaying the function selected by the remote control device 20, etc. on the CRT, 24 Is a control unit for controlling the overall functions of the TV.

That is, in the above-described apparatus, when the viewer selects the sub picture function using the remote controller 20 while the controller 24 controls the first tuner 2 to control the broadcast station, the controller 24 In addition to controlling the second tuner 7, the PIP processing unit 12 controls the broadcast channel desired by the viewer through the sub-screen. Therefore, the viewer can select the channel for the sub-screen using the remote control device 20 after selecting the sub-screen function described above, so that the viewer can check the broadcast status of other channels while watching the desired channel broadcast through the main screen.

However, in the above-described TV, except that the viewer can watch the desired broadcast channel through the main screen, the search operation is still cumbersome because the broadcast channel must be checked as the existing channel is tuned like the conventional TV. There is a problem of inconvenience.

Accordingly, an object of the present invention is to provide a TV, which is created to solve the above-described problems, and which makes it possible to easily check the termination state of each broadcast channel.

A television having a broadcasting end channel display function according to the present invention for realizing the above object comprises a channel memory means for storing broadcast channel data in a television receiver having a second tuner in addition to a first tuner for tuning a broadcast channel. And pre-international language means for sequentially pre-international language tuning of the second tuner based on the channel data stored in the channel memory means, synchronous detection means for detecting a synchronization signal from the broadcast signal tuned by the second tuner; And display means for displaying a broadcast channel on which the synchronization is not detected by the detection means on the CRT.

In addition, a TV having a broadcasting end channel display function according to the present invention is a television receiver having a second tuner in addition to a first tuner for tuning a broadcasting channel, the first receiver for selecting a channel for which the viewer wants to end broadcasting. A channel memory means for storing broadcast channel data selected by the first selection means, a pre-international language means for sequentially internationalizing the second tuner based on the channel data stored in the channel memory means, And synchronous detection means for detecting a synchronous signal from the broadcast signal tuned by the second tuner, and display means for displaying on the CRT a broadcast channel for which synchronization is not detected by the synchronous detection means.

According to the present invention having the above-described configuration, the tuning control means controls the second tuner to select the respective broadcast channels and detect the synchronization signal by the synchronization detection means to detect the broadcast termination state of each broadcast channel. The detection result at this time is displayed on the CRT by the display means.

Therefore, it is possible to check the end state of other broadcast channels while watching any broadcast channel to be watched.

Hereinafter, an embodiment according to the present invention will be described with reference to the drawings.

FIG. 2 is a block diagram showing the configuration of a TV with a broadcast end display function according to an embodiment of the present invention. In FIG. 2, the same parts as those in FIG. 1 are denoted by the same reference numerals, and detailed description thereof is omitted.

In FIG. 2, reference numeral 31 denotes a remote control device having a selection key for selecting a broadcasting end display function, and 32 denotes a synchronization signal from a composite image signal output from the second image detector 10 for a sub picture. The synchronization detector 33 is an OSD generator that outputs OSD pattern data for displaying the corresponding channel number of the channel memory 22 on which the synchronization signal is not detected by the synchronization detector 32 on the CRT.

Also, reference numeral 34 denotes a control unit for performing a broadcast end display function, which reads channel data stored in the channel memory 22 sequentially so that the viewer selects the broadcast end display function using the remote controller 31. While determining whether the corresponding broadcast channel is on the basis of whether the detection signal is applied from the synchronization detector 32 while the second tuner 7 for the screen is internationalized, the OSD generator 33 is controlled to broadcast. In other words, the broadcast channel where the broadcast is terminated is displayed.

Next, the above-described operation will be described in more detail using the flowchart shown in FIG.

When the viewer selects the broadcasting end channel display function by using the remote control device 31 (step ST0), the controller 34 reads the first channel data from the channel memory 22 and based on this, the second tuner 7 ), The first broadcast channel is tuned (ST1 step ₁ ).

Then, the synchronization to determine (ST1 step ₂₎ that the sync detection signal applied from the detecting unit 32, when the synchronization is detected, the other broadcast channel (second channel) for executing the channel selection operation the other hand, when synchronization is not detected, The OSD generation unit 33 is controlled to display the first channel number on the CRT (ST1 step ₃ ).

Further, the broadcast end channel searching operation is performed sequentially up to the Nth channel until the viewer terminates the broadcasting end channel display function by using the remote controller 31 (ST (N + 1) step). As the channel display is executed, the channel number on which the broadcast is terminated is displayed on the CRT so that the viewer can confirm it.

Here, the above-mentioned broadcasting end channel display can be executed in various ways, and FIG. 4 shows an example thereof.

In FIG. 4, the position where each broadcast channel is displayed is set differently. In such a case, the OSD data supplied to the OSD generator 33 can be set differently according to channels.

5 is a schematic diagram showing the configuration of the OSD generating apparatus, which is based on the register 51 for storing the position for displaying the OSD pattern and its size data, and the like based on the address data registered by the controller 32. FIG. The video RAM 52 which accesses the generation ROM 53 and controls the buffer unit 55 based on the color data, the character generation ROM 53 in which a plurality of character data are stored, and the character generation ROM Shift register 54 which sequentially outputs the character data output from 53, and the output of this register 54 corresponding to R (Red) and G (Green) under the control of the video RAM 52; ), An output buffer output as a B (Blue) signal, shifted from the video RAM 52 based on data stored in the register 51, an OSD clock (OSD CLK), and horizontal and vertical synchronization signals (H, V). OSD control in addition to controlling operation timing of resist 54 It is configured to include a king-signal (Y ') OSD releasing portion 56 for outputting.

That is, the OSD generator 23 uses the OSD control unit 56 to display video based on OSD data such as the position or magnification stored in the register 51 and the OSD clock and vertical and horizontal synchronization signals V and H applied from the outside. The operation timings of the RAM 52 and the shift register 54 are controlled, and the video RAM 52 controls the character generation ROM 53 and the output buffer 55 based on the registered color and address data, thereby controlling the CRT on the CRT. An RGB signal and an OSD blanking signal Y 'are generated to generate characters of a predetermined size and a predetermined color at a predetermined position.

Therefore, in FIG. 2, when the controller 34 controls the OSD generator 33 with different position data and color data for each channel, as shown in FIG. Not only can it be displayed at the location, but also its color can be set differently.

In general, in the NTSC system, the frequency of the vertical synchronization signal is set to 60 Hz so that 60 screen scans are performed in one second. Therefore, when the control unit 34 properly controls the pre-international language speed of the second tuner 7, it is possible to display the broadcast termination channels sequentially searched to be visually recognized simultaneously. It can also be set to display sequentially.

For example, in the screen display of FIG. 4, it is possible to form a visually beautiful screen output state by setting each broadcast channel number differently in its position and color so that the display is performed sequentially.

That is, according to the above embodiment, when the viewer selects the broadcasting end channel display function, the controller 34 sequentially internationalizes each broadcasting channel using the second tuner 7 for the sub-screen, and displays the broadcasting state. By checking and displaying the channel number on which the broadcast is terminated on the CRT, the viewer can easily recognize the channel number after the broadcast.

In addition, the present invention is not limited to the above embodiments and various modifications can be made without departing from the technical scope of the present invention. For example, in the above embodiments, the channel data stored in the channel memory 22 may be modified. On the basis of this, although the broadcast is terminated, the viewer may select the desired channel number and detect the broadcast end state only for the selected channel.

As described above, according to the present invention, it is possible to realize a television receiver with a broadcasting end channel display function that enables the viewer to easily check the termination state of each broadcasting channel.

Claims (4)

A television receiver having first and second tuners for tuning a broadcast channel, comprising: detecting a synchronization signal from a channel memory means for storing broadcast channel data and a broadcast signal of channel broadcast tuned by the second tuner; Display means for displaying on the CRT the channel number which has been terminated under the control of the synchronous detection means, the control means, and the second tuner in sequence based on the channel data stored in the channel memory means. And control means for controlling the display means to display and control the channel number on which the synchronization is not detected by the synchronization detection means on the CRT. 2. The apparatus of claim 1, further comprising: selecting means for the viewer to select a broadcasting end channel display function, wherein the control means performs the function only when the broadcasting ending channel display function is selected by the selecting means. A television receiver having a broadcasting end channel display function. A television receiver having first and second tuners for tuning a broadcast channel, comprising: first selecting means for selecting a channel for which a viewer wants to end a broadcast search, and broadcasting channel data selected by the first selecting means; A channel memory means for storing, a synchronous detecting means for detecting a synchronous signal from the broadcast signal of the channel broadcast tuned by the second tuner, and a channel number for ending the broadcast under the control of the control means for displaying on the CRT On the basis of the display means and the channel data stored in the channel memory means, the second tuner is sequentially internationalized, and the display means is controlled to display channel numbers for which synchronization is not detected by the synchronization detecting means. And a control means for controlling display on the CRT. 4. The apparatus according to claim 3, further comprising a second selection means for the viewer to select a broadcasting end channel display function, wherein the control means performs the function only when the broadcasting ending channel display function is selected by the selection means. And a television receiver having a broadcasting end channel display function.